Dr. cho wants to know if differences in the growth rate of fish are based on genetics or the environment. he buys two fish. fish 1 is fed everyday, while fish 2 is fed every other day. at the end of a month, fish 1 is nearly 15 percent larger than fish 2. considering the fish have a nearly identical genetic makeup, what can dr. cho conclude? a) environmental changes can account for all the differences in growth rate. b) genetic influences must account for a majority of the differences in growth rate. c) environmental conditions were more favorable for fish 2.d) differences in growth rate cannot be determined by his simple experiment.